What year was the x-15 invented?

Anonymous

∙ 14y ago

Updated: 8/19/2019

The RFP for the X-15 was published in December 1954, with the rocket engine submitted in February 1955. The first unpowered test flight took place in June 1959, with the first powered test flight in September 1959.

Wiki User

∙ 14y ago

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